| "Appa's Lost Days" | |
|---|---|
| Avatar: The Last Airbender episode | |
 A scene where Appa is forced to be used for a circus. It is praised for its depiction of cruelty to animals. | |
| Episode no. | Season 2 Episode 16 |
| Directed by | Giancarlo Volpe |
| Written by | Elizabeth Welch |
| Featured music | |
| Production code | 216 |
| Original air date | October 13, 2006 |
| Guest appearances | |
| |
"Appa's Lost Days" is the sixteenth episode of the second season of the American animated television series Avatar: The Last Airbender, and the 36th episode overall. The show follows Aang (Zach Tyler Eisen), the last airbender and the “Avatar”, on his journey to bring balance to a war-torn world by mastering all four elements: air, water, earth, and fire. On his quest, he is joined by companions Katara (Mae Whitman), Sokka (Jack DeSena), and Toph Beifong (Jessie Flower), and hunted down by Fire Nation prince Zuko (Dante Basco) and princess Azula (Grey DeLisle).
The episode, written by Elizabeth Welch and directed by Giancarlo Volpe, follows Appa (Dee Bradley Baker) struggling to reunite with Aang after he was kidnapped in the episode "The Library". Along the way, he encounters Kyoshi Warrior Suki (Jennie Kwan) and Guru Pathik (Brian George). Meanwhile, the episode also showcases the first time Appa met Aang through flashbacks. The episode released on Nickelodeon on October 13, 2006, and received positive reviews for its depiction of cruelty to animals.